Instructions / Assembly
６－５
Does air-fuel mixture leak from the
６－６
Clean the inside of the CARBURETOR. Replace wearout parts,such asthe diaphragm
６－７
６－８
６－９
６－１０
６－１１
６－１２
６－１３
７－１
７－２
７－３
７－４
７－５
７－６
８－１
Is t he CAP,OIL tightened?
Yes
８－２
Tighten the CAP,OIL.
８－２
Was the engine oil spilled onto the
equipment at feeding and/or changeing oil.
No
８－３
Be careful not to spill the engine oil around the equipment at
feeding and/or changing. If spilled, wipe off the equipment.
Oil and engine care
８－３
Is the inside of the AIR CLEANER
cleaned before operation?
Yes
８－４
Be sure to clean the inside of the AIR CLEANER before operation.
The inside of the AIR CLEANER easily gets dirty with the engine oil.
See ＰＰ．３６～３７．
８－４
Is the OIL SEPARATOR in the
AIR CLEANER loose?
No
８－５
If loose:
- Fasten the OIL SEPARATOR to the bottom, or
- Replace the OIL SEPARATOR with a new one (5933501600).
８－５
Is the gasket(rubber packing)
of the CAP,OIL stiff?
No
８－６
Replace the gasket with a new one(0213229990). A gasket used for
a long time is likely to get stiff, whitch causes an oil leak.
Engine care
８－６
Is any screw in the engine
loose?
No
８－７
Tighten loose screws again.
Working surroundings
８－７
Is the operation beeing done in
an unusual place and/or work method?
No
８－８
Operate the equipment in an appropriate way for the operation in an unusual
place and/or work method. Ask a serviceman for the appropriate way.
Unknown cause ８－８ Ask a serviceman without knwn cause of the oil leak.
Oil care ９－１
Was it confirmed at the pre-operation check
that the engine oil tank was filled
with engine oil of 30-80cc ?
Yes
９－２
If the oil level is over 80cc drain the oil from the engine oil tank
or if less 30cc fill the oil tank with the engine oil, to the level
of 30-80cc. See Ｐ．３８.
Woking surroundings
９－２
Is the operation beeing done in an
unusual place and/or work method?
No
９－３
Operate the equipment in an appropriate way for the operation in an
unusual place and/or work method. Ask a serviceman for the appropriate way.
AIR CLEANER care
９－３
Is the inside of the AIR CLEANER
cleaned before operation?
Yes
９－４
Be sure to clean the inside of the AIR CLEANER before operation.
The inside of the AIR CLEANER easily gets dirty with the engine oil.
See ＰＰ．３６～３７．
Others ９－４
Drive the engine at about 7000rpm
for about 3 minutes. Has the white
smoke disappeared?
Yes
No
９－５
Oil consumption ９－５
Is the engine oil consumed
over 5cc an hour?
No
９－６
Perform work orders 7-4 or below until the problem of the excess
oil consumption is corrected. (Excess oil consumption may cause
clouds of white smoke.)
Unknown cause ９－６
Clouds of white smoke do not come out during operation with the oil consumption at 5cc or less an hour and in normal use. Check again
that the equipment has been in operation in an appropriate place and work method. Ask serviceman for further information.
１０－１
Is the COVER,AIR CLEANER attached
correctly?
Yes
１０－２
Attach the COVER,AIR CLEANER correctrly. A wrong COVER,AIR CLEANER
attachment may cause a change in shape of the AIR CLEANER.
See Ｐ．９．
Enjgine care
１０－２
Is the O-ring correctly placed
between the CARBURETOR and PLATE
,
AIR CLEANER?
Yes
１０－３
A wrong O-ring place ment causes a change in shape of the
PLATE,AIR CLEANER.
Others １０－３
Does the PLATE,AIR CLEANER still
remain changed in shape?
Replace the PLATE,AIR CLEANER with a new one.
32
Oil leak from engine
Clouds of white smoke come
out of muffler during operation
Change in shape
of AIR CLEANER
Poor acceleration and output shortage of engine
Fuel
Valve
train
Insufficient
compression
Plug and
Ignition
Cooling
Unknown case
Abration
and
damage
Trouble
Work order
Point to be checked
Action to be done
With problem
Without problem
mating faces of the CARBURETOR,INSULATOR etc.?
Investige the leakage and correct it.Replace the packing ,etc.
with a new one if necessary.
See ＰＰ．２６～２７．
with new ones.Replace the CARBURETOR with a new one if necessary.
Adjust the valve clearance at 0.15.
See Ｐ．２１．
Any ablation of the CAM top needs replaceing the CAMGEAR with a new one.
See ＰＰ．１９～２１.
Correct the bad CAMGEAR timing. See ＰＰ．１９～２１．
Compressed insufficiently.Return to work order ４－２
to get the proper compression i
n the combustion chamber.
The plug ignites insufficiently.Return to work ２－３
to get the sufficient spark.
Remove the durt to get the good cooling air flow.
If the oil level is over 80cc drain the oil from the engine oil tank
30-80cc.See Ｐ．３８．
or if less 30cc fill the oil tank with engine oil,to the level of
７－３
Perform work orders ８－１，８－２ and ８－５ when a fairy learge
amount of leaked oil is found around th
e CAP,OIL.
Marked ablation and/or damage needs replacing the CYLINDER
with a new one.
Marked ablation and/or damage needs replacing the PISTON
with a new one.
Marked ablation needs replacing the PISTON RING with a new one.
See Ｐ．１４.
No
６－６
No trouble in the fuel passage
６－７
The va lve clearance is
within the criterion
６－８
No ablation
６－９
Yes
６－１０
No
６－１１
Yes
６－１２
No
６－１３
Yes
７－２
N
o
No
７－４
No ablation or damaged
７－５
７－６
No ablation or damaged
Disassemble the CARBURETOR to test it
for the component parts beeing clogged
Remove the ROCKER COVER to check
whether the value clearance is
up and/or deteriorated.
within 0.08-0.40(criterion:0.15).
of the cam top.
Test the CAMGEAR for any ablation
(The timing mark of the CAMGEAR faces
down vertically when the piston is
at the top dead center.）
Is th
e CAMGEAR timing right?
Pull the RECOIL STARTER to check for proper
while the engine stops. Does the compression
seem to be insufficient?
compression in the combustion chamber
Does the PLUG ignite sufficiently?
Is the cooling air passage clogged
up at its inlet with durt? Has the
engine over-heated consequently?
check that the engine oil tank was filled
Is the engine oil consumed
the OIL CAP,etc.?
Does the engine oil leak from
over 5cc an hour?
Disassemble the whole engine .
marked ablation and/or damage.
and/or damage.
Test the PISTON RING for marked ablation.
Was it confirmed at the pre-operation
with engine oil of 30-80cc?
Test the CYLINDER bore for
Test the PISTON for marked ablation
Ask a serviceman without known cause of the engine trouble(poor accelation and/or output shortage) .